Significant work is currently underway to enable the 9-1-1 system to transition from telephone-based voice only systems to a fully interoperable Internet Protocol (IP) based, multimedia Next Generation (NG9-1-1) system capable of supporting a variety of different communications devices and protocols. This document contains a list of operational capabilities or features that are expected to be supported in a standards-based NG9-1-1 system. The capabilities described within this document represent minimum levels of required functionality.